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AC Won't Turn On
in Fort Lauderdale, FL
Fort Lauderdale gets about 76 thunderstorm days a year, more than almost anywhere else in the country. That much lightning means power surges, and power surges kill AC components fast. When your system won't turn on at all, something in the electrical chain from the breaker to the thermostat to the unit itself has failed. The fix depends on which part gave out.
Quick Answer
When the AC won't start at all, the problem is usually a tripped breaker, a bad capacitor, or a failed control board. In Fort Lauderdale, afternoon lightning storms trip breakers and fry capacitors more often than most places. Check your breaker panel first. If the breaker is fine, call (754) 354-3070 to have a tech test the capacitor and electrical components before the next heat wave hits.
Telltale Signs
Warning Signs to Watch For
- Thermostat is set to cool but nothing happens, no sounds, no airflow
- Outdoor unit and indoor air handler are both completely silent
- Thermostat screen is blank or flickering
- Breaker for the AC is tripped in the electrical panel
- System clicks like it's trying to start but nothing actually runs
Root Causes
What Causes AC Won't Turn On?
Tripped Breaker or Blown Fuse
Your AC runs on a dedicated circuit. A power surge from a Fort Lauderdale thunderstorm, or a struggling motor drawing too much current, trips the breaker. If the breaker trips again right after you reset it, something deeper is wrong and needs a tech.
The Fix
Breaker Reset or Fuse Replacement
Resetting a breaker takes a minute. Replacing a blown disconnect fuse outside near the condenser takes a few minutes more. If the breaker keeps tripping, the real problem is elsewhere and the breaker is just protecting the rest of your home.
Failed Start Capacitor
The capacitor gives the compressor and fan motors the jolt they need to start up. Heat wears capacitors out, and Fort Lauderdale units run so many hours per year that capacitors often fail within 5 to 7 years. A dead capacitor means the motor sits there humming but never actually starts.
The Fix
Capacitor Replacement
A tech tests the capacitor with a meter and swaps it out if it's weak or dead. It's one of the more common repairs in South Florida and usually gets the system running again the same visit.
Failed Control Board or Thermostat
The control board is the brain of your indoor unit. It reads the thermostat signal and tells everything else what to do. Lightning surges in Wilton Manors, Oakland Park, and other parts of Fort Lauderdale regularly fry control boards, especially in systems without proper surge protection.
The Fix
Control Board or Thermostat Replacement
A tech checks both the thermostat wiring and the control board with a meter to find which one failed. Replacing either one is a straightforward repair once the right part is in hand.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Tripped Breaker or Blown Fuse | Failed Start Capacitor | Failed Control Board or Thermostat |
|---|---|---|---|
| Breaker in panel is tripped to the middle position | |||
| Outdoor unit hums for a few seconds then stops | |||
| Thermostat screen is blank with fresh batteries installed | |||
| Nothing works after a nearby lightning strike or power flicker | |||
| System clicks once then goes silent, repeats every few minutes |
Free Inspection
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